/**
 *2D世界
 * author:noodles 
 */
package utils.effects.physics2D
{
	import flash.display.DisplayObject;
	import flash.display.Sprite;
	
	public class World2D extends Sprite
	{
		public function World2D()
		{
			super();
		}
		
		//添加物体到世界
		public function addObj(obj:DisplayObject):void
		{
			
		}
	}
}